Concrete-mixing machine.



J. MULLER, CONCRETE MIXING MACHINE.

APPLICATION FILED APR.'18,1907. 973,543. I Patented Oct. 25, 1910.

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. .Zhvezz Z01- (ig'ifzfim-J I J. MULLER. conozm'rn MIXING mon'nm.APPLICATION FILED APB. m. 1907.

973,543. Patented Oct. 25, 1910.

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UNITED sTA'rns rnIENT OFFICE.

JEAN MULLER, 0F LACHEN-VONWYL, NEAR ST. GALLEN, SWIIZERLAND.

CONCRETE-MIXING MACHINE.

Specification of Letters Patent. Patent-ed Oct. 25, 1910.

Application filed April 18, 1807. Serial No. 388,895.

5! '0 all whom it may concern:

Be it known that I, J EAT. Mt'TLLEn, a citizen of Switzerland, resldingat Lachen- Vonwyl, near St. Gallen, Switzerland, have crete mixingmachines are also known with drums runmng on pulleys and with or withoutdriving shaftextendin through the drum. In this type of mac iine thedrum being in one part the material to be mixed is'obliged to travelthrough the whole of it hence the drum cannot be divided in the middlefor discharging, which renders the machine very troublesome to attend.There are also concrete mixing machines in which the elevator rails uponwhich the truck runs can be folded but not the frame which carries thehoisting pulleys so that. for trans porting the machinethe said framemust first be removed,

The object of this invention is to obviate the said defects. .To thisend in the first place I employ a drum formed in two parts one of whichis slidable on the driving shaft; One end of this driving shaft. ismounted in a bearingand the othereud has secured thereto thenon-slidablc drum part mounted on pulleys, into which it. onlypartlyextendssoj-that the inlet is always perfectly free fromobstruction. This arrangement permitsa rapid charging and dischargingofthe dru m without. any diffioulty whatever. In the second placeIconstruct the frame of the elevator carrying the hoistiugf pulleys andthe truck rails'so as to be capable of'bciug thrown back'or folded tofacilitate transport. I attain thescjobj'ects by ,the mechanismillustrated in theaccompanying two sheets of drawings, in

which Figure-1 is a side elevation partly in sec-' tion of a. concrete-|nixing-ma(.-lnue constructed in accordance with my invention. Fig. 2is an end new of the unxing drulu In prae-' as seen from the. right.Fig. 3 is a plan, and Fi 4 a detail on an enlarged scale.

Simi or letters refer, to similar parts throughout the several views.

In carrying out my invention and referring to the figures generally, theconcrete mixing druln a, a. is formed in two parts and arranged on theshaft 7); The latter is at one end mounted in the bearing X and at theother end has secured thereto the drum half a. The drum half a has aboss in at. its closed or left side which has a right "and a left handscrew thread. This thread is rigidly connected with the drum 'half awhich is rotated by the drum half a and moves the drum half a when one-of the tongues is brought in gear with 1t.

y moving the lever o placed under the influence of a weight 0,- into theposition shown in dotted lines in Fig. 4., atongue 0* connectedtherewithcan be brought in gear with the said right hand thread and by moving thelever v in the opposite direction, see full lines, the tongue 0'' ingear with the left hand screw thread. These tongues are controlled bythe lever o in the following manner: The: fulcrums 9 of the lever systemandtheshaft of the lever v are turnably connected to a part of the frameof the machine. The lever 1 is rigidly connected to the shaft 'ofthelever n and has its other end loosely connected by a 'link to the bolt 5one end of which formsthe tongue 1' and the other end of which isloosely connected to the; lever 8.- The bolt I 5 is also looselyconnected to the bolt 4 by means of a two armed lever 3, the one cud;

tive power and In gear with a spur wheel secured upon the shaft A. Thclatter is mounted at one end in the hearing A and at the: other eudin abearing Ai Upon the shaft- A is also secured a spurpinion Zr whichimparts the rotary motion received from m' and w to a s or when 6secured upon the shaft- 1) which causes the drum By means of a number ofbolts 11" on the inside of the drum half a projecting into the drum halfa and abutting a oinst abut-- ment pieces therein, rotary moti is trans-105. half a secured upon the latter to be rotated;

-the wheels leys 0 to turn and.

niitted from the drum, half a to the drum half a. By settin the lever winto the position shown in .ull lines in Fig. 4 (the shaft Z) rotatingin the direction shown by the arrow) the drum half a is longitudinallymoved to the right until it bears against the other drum half a. Bymoving the lever 12' into theposition shown in dotted lines the drumhalf a will be dis placed to the left and thus the drum a, a opened inthe middle. The fixed drum half has a charge inlet/c which is'perfectlyfree from obstruction owing to the driving shaft not extendingcompletely but only partly through the drum.

To the fixed section at the said inlet is secured a rim (1 supported bytwo rollers q mounted upon a cross piece vehicle frame e and the shaftI) being there by supported at this end. Into the said charge inletprojects the feed trough 1b which is secured to the two elevator rails.The latter are secured to the vehicle frame a of two parts i and-jhinged togethervat 7c, the end of each upper part a being benthorizontally.

j serves for the downward extension of the upper part i and is capableof being raised and folded upon 2'. A

Thevehicle frame 6 is furnished with a hoist frame Z- the upper part ofwhich is se cured to the elevator rails and the lower part to the-saidvehicle frame'i The portion of the said hoist frame projecting above theelevator rails is hinged at m and can be v a rope..-pulley 0 adapted towind 'up and unwind the ropes 71 secured to the truck/j. To the shaft nis also secured a pulley 7' connected by means the rope scan be and offthe drum 2! versa. Th1.S causes the rope p wound onto the pulley 9' andvice raised or lowered. The said ,truck at its bottom and top 1srespectivelyprovided with g and 9 t e former being situated above thetop flange and the latter engaging between the flanges ofthe elevatorrails;

. a disengaging lever u and en raising the-truckq, the wheels 9 run kflange of theelevator rails feels g flan es guide the'tr'uck. I

The Windlass has a clutch y, y employed uponthe shaft A, the clutch half3 being formed to ser'veias clutch 'half 1 with abevel wheel in gear abevelwheel secured upon the re e The clutch half y is connected with thelatter by moansof two rods 16,24 with the lever-u. In

drum t'of a Windlass f secured to the -h In order to prevent the truck 9from moving back the two rake jaws 3 are pressed against the brakepulley 3 In the drawing the full lines show the truck 9 in its lowestposition ready for filling. To convey its contents through the trough7:, into the mixing drum a; the filled truck 9 is raised into theposition shown in dotted lines in which one of the'wheels q contactswith the lever it connected with the oist gearso. as to stop the sameautomatically.. The truck g takes up this position owing to the lowerart thereof being drawn upward and the wheels-g being prevented fromrising by the horizontal part of the elevator rails; so that the truck gtilts and empties its contents, after which it is lowered for beingfilled again.

After the material has been sufiiciently mixed it is discharged fromthe'drum downward by displacing the slidable partthereof.

The truck 9 can be folded upward and the upper portion of the hoistlowered backward into the position shown in long and short dotted lineswhich facilitates the transport of such concrete mixing to pieces.

The machine may be driven by any s'uitable motor.

I claim':

1. In a mixing apparatus, a driving shaft, a .rotary mixing chamberthereon comprising two parts, one of-which has acentral charge openingand is rigidly and the other sli'dably secured to the said shaft thesaid slidably se'curedpart and the other terminates inside the rig dlysecured part a bearing for sup orting the said shaft oute mixing camber, means other than running between the.

a brake pulley and the the said shaft for supporting the said rigidlyfixed chamber part andmechanism for moving the said slidable part intoand out of engagement with the said rigidly secured part, all combinedsubstantially as and for the purpose set forth.-

\ n' a' mixing apparatus, a driving shaft, a rotary mixing chamberthereon machines by rail without having to take itand one end of whichshaft extends through distance away from the said charge opening,-

raised, the rail part which has a compr' g two parts, one of. central chopening and is rigidly and the other sli ably secured to the said shaft;

one end of the saidshaft extending through the said sIidabIy securedpart and'the other terminat ng inside the shaft outside the said mixingchamberf means for supporting the said rigidly secured pai'iflcomprisinga rim thereon and rollers upon which the said rim runs and mechanism formoving the said slida ble part into and out of engagement with the saidrigidly secured part, all combined substm1- tiallyas and fertile purposeset forth.

In testimony whereof I have signed my name to this specification in thepresence of 10 two subscribinu witnesses.

JEAN MULLER.

VVit-nesses CARL LAUDER, MARY FALUONER.

